Mineral fiber ceiling Mineral fiber ceiling board Standard size: 300x600mm, 600x600mm, 600x1200mm Thickness size : 7.0mm, 8.0mm, 9.0mm, 10mm, 12mm, 14mm, 15mm , 18mm Features: 1) material: mineral fiber acoustic ceiling board 2) surface: a variety of surface patterns available 3) coating: pvda 4) color: white 5) density: 391kg/m 6) fiber content: >=90% 7) fire performance: meet jc/t670-2005 8) fracture load by bending (n) : 192n +600x600x12mm 9) damping index: 2.7 (rh90%+3%, temperature 40++2+) 10) noise reduction coefficient: nrc 0.35 - 0.6 depending on the pattern And the thickness 11) light reflectivity: >=85% 12) no asbestos